CN102639785A - Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels - Google Patents
Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels Download PDFInfo
- Publication number
- CN102639785A CN102639785A CN200980161863.4A CN200980161863A CN102639785A CN 102639785 A CN102639785 A CN 102639785A CN 200980161863 A CN200980161863 A CN 200980161863A CN 102639785 A CN102639785 A CN 102639785A
- Authority
- CN
- China
- Prior art keywords
- container
- wood chip
- container handling
- vertical tube
- plug flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229920002678 cellulose Polymers 0.000 title abstract description 4
- 239000001913 cellulose Substances 0.000 title abstract description 4
- 238000010924 continuous production Methods 0.000 title abstract 2
- 239000002994 raw material Substances 0.000 title description 4
- 239000002023 wood Substances 0.000 claims abstract description 73
- 239000000463 material Substances 0.000 claims abstract description 12
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims description 49
- 239000007788 liquid Substances 0.000 claims description 39
- 238000009835 boiling Methods 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 11
- 238000012545 processing Methods 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- 239000002002 slurry Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 239000000284 extract Substances 0.000 claims description 4
- 238000007701 flash-distillation Methods 0.000 claims description 4
- 239000010875 treated wood Substances 0.000 claims description 3
- 229920001131 Pulp (paper) Polymers 0.000 abstract description 9
- 238000009826 distribution Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 description 15
- 239000003513 alkali Substances 0.000 description 10
- 238000007654 immersion Methods 0.000 description 8
- 238000010025 steaming Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 5
- 238000007598 dipping method Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000013043 chemical agent Substances 0.000 description 4
- 239000007799 cork Substances 0.000 description 4
- 238000010411 cooking Methods 0.000 description 3
- 239000011121 hardwood Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 241000196324 Embryophyta Species 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 230000005465 channeling Effects 0.000 description 2
- 230000003203 everyday effect Effects 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 244000166124 Eucalyptus globulus Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C7/00—Digesters
Abstract
The invention relates to a method and arrangement for adding treatment liquor to comminuted cellulose material, preferably wood chips, during the manufacture of chemical pulp in a continuous process. Said process using a down flow vessel where chips are descending down the vessel in a plug flow and where treated chips are continuously fed out at the bottom of the vessel. By arranging more than two parallel pipes 7b offset from the center of the vessel could a better distribution of treatment liquor be obtained, and the disturbance of the chip plug flow descending down the vessel will be reduced to a minimum.
Description
Technical field
The present invention relates to as described in the preamble during using the downflow system container according to claim 1 and claim 9 with continuous processing manufacturing chemistry slurry; Be used for adding the method and apparatus of treatment fluid to powder fiber cellulosic material (being preferably wood chip), in the downflow system container wood chip with plug flow (plug flow) form to decline.
Background technology
Use continuous steamer boiling chemical cellulose paper pulp in the prior art; In boiling vessel, before the beginning digesting technoloy, generally use the pretreatment unit that has chip bin (chip bin), steaming container (steaming vessel) and dipping chip chute (impregnating chip chute).In immersion fluid or transporting fluid, form subsequently before the wood chip slurry, in chip bin, carry out decatize (steaming) with one or several step.In order to confirm air contained in the removal wood chip and moisture so that immersion fluid can permeate wood chip fully and make air not be inhaled into system, it is indispensable that decatize is considered to.
Attempted chip bin and combined, so that obtain simpler system by this way with steeper.
US2,803,540 have disclosed a kind of system, in this system from the wood chip of chip bin supply to one realize knockdown decatize and dipping therein container.In this container, wood chip, is used to be positioned at the outer annular spread manifold/collector (header) of chamber wall and to make the nozzle transparent walls by decatize on the top of container, adds the immersion fluid that is in uniform temp in various level heights.These principles also are applied to be called as the technology of " Mumin boiling ", and its Sven Rydholm that is described in Technical Association of the Pulp and Paper Industry (paper pulp and paper industrial technology association) publication in 1970 shows " Continuous Pulping Processes (pulping process continuously) " the 144th page.In this technology, be transferred into the combined type steeper without the wood chip of decatize, realize decatize on the top of this container, and be added in the container receiving to compel cycle period certain immersion fluid of naming a person for a particular job on the top of container.In the case, only the edge flow direction identical with wood chip delivers immersion fluid.
At US3, disclose a kind of system that similarly has low pressure first public decatize and steeper in 532,594, this system for example comes into operation in the Skoghall of Sweden factory.Wherein the steeping liq of heating adds the wood chip capacity to via central tube, but also the additional central pipe that is used to supply steam is shown.This system is afterwards because a variety of causes (it is too high and so on that for example screenings and shive content discharge in the paper pulp in the capacity problem of service ability problem, follow-up feed system and institute) and quilt is abandoned.
At US5, in the system shown in 635,025, wood chip before the container that is supplied to the combining form that is chip bin, steeper and chip chute not by decatize.Wood chip is positioned on the liquid level, and the decatize of wood chip takes place at this, carries out the simple interpolation of immersion fluid through the chamber wall that is positioned under the liquid level.
US6,280,567 have disclosed the another kind in this type systematic, and wherein wood chip is fed to before the steeper of atmospheric pressure not by decatize, and wood chip is heated through the hot black liquor that interpolation maintains 130-140 ℃ of left and right sides temperature in this container.The steeping liq that is added be via nozzle with similar US2, the mode shown in 803,540 is added that is is used the supply nozzle that penetrates wall of a container to add.
SE523,850 have disclosed a kind of replacement system, and the top of wherein adding the pressurization black liquor to steaming container makes black liquor after standing pressure drop, discharge the steam that is used for decatize technology thus.The interpolation of hot black liquor is carried out through horizontal supply pipe; Horizontal supply pipe penetrates wood chip bed (chip bed), and on the length direction of this pipe, has many holes.Even but on big (but not in entire cross section) zone, distribute hot black liquor, and this scheme is also also inadvisable, and this is because horizontal tube can hinder the motion of wood chip plug (chip plug).Prior art mainly uses central tube or annular spread nozzle to add steeping liq to knockdown decatize and steeper.In recent years, the design capacity of novel boiling vessel system significantly increases, from typical 500-2000 air dried tonne/24 hours (ADt/24h) to productivity ratio above 5000 air dried tonne/24 hour.Because design productivity ratio improves, the diameter of knockdown wood chip decatize and steeper also increases thereupon.In fact, utilize prior art processes that the diameter of container is increased and make up, the treatment fluid that is added not uniform distribution causes producing the chemical concentrations gradient thus on the entire cross section of container.SE523,850 disclose another program distributes to improve, but therefore it replace the greater risk of having introduced the obstruction of wood chip plug.
In the larger process container, utilize single central tube to add another shortcoming of handling chemical agent and be the fast uniform plug flow motion that also will destroy of flowing of chemical agent in the bottom of container.
Only adding other shortcomings of handling chemical agent with a central tube is:
(1) central tube diameter in having the system of big design capacity becomes big; This means in the below, end of central tube (it can continue the bottom to container of decurrence always) to form the hole that diameter is identical with this pipe, and this can cause the raceway groove (liquor channeling) of (wood chip and) liquid;
(2) cause producing on one point a large amount of flash vapor (flash steam); This again can be because of this high velocity vapor and chip flow reverse flow cause steam raceway groove (steam channeling) around central tube, and this can cause the steam of chip pile to blow leakage (steam blow-through) phenomenon.
Utilization is positioned at the outer distributing manifold of container; Except that the extra demand of control valve/appearance and each pipeline and the cost that therefore increases; Also be difficult to the central dispense chemical agent from the shell side to the container fully, therefore there is tangible liquid raceway groove risk in the shell along container.All these shortcomings can cause wood chip to receive inhomogeneous processing, therefore by those near wall or produce the paper pulp that quality differs widely near the plug flow of central tube.
The technology of under basic atmosphere (pressure) condition, carrying out decatize and dipping with the common process container by Mei Zhuo company (Metso Paper) with IMPBIN
TMBrand name put goods on the market.The following a plurality of improvement projects that belong to this conception of species are patented:
SE518,738 (=US7381302), wherein add the steeping liq that temperature continues rising with a plurality of positions of higher higher net water head (static head) in IMPBIN equipment;
SE528,448 (=EP1818445), wherein the liquid circulation stream of IMPBIN equipment separates with those circulation streams in the boiling vessel;
SE530,725 (=EP2065513), wherein the top chilling spray device of IMPBIN equipment is used to suppress spurting of foul gas.
The above-mentioned shortcoming of prior art interpolation treatment fluid is along with the size of these IMPBIN type decatizes and steeper becomes big and becomes more obvious.The diameter of typical cylindrical vessel with boiling vessel system of the above capacity of 5000 air dried tonne every day also surpasses 9m.
Summary of the invention
Goal of the invention and meaning
Principle purpose of the present invention be obtain a kind of during using the downflow system container with continuous processing manufacturing chemistry slurry; Be used for the modifying device that treatment fluid adds wood chip to; To decline, this device does not show and the aforesaid and related shortcoming of other well-known schemes wood chip with the plug flow form in container.This principle purpose is even more important in big capacity technology; In big capacity technology, every day, production capacity surpassed 4000 air dried tonne/paper pulp and up to 6000 air dried tonne/paper pulp, and container handling is huge but also have the diameter above 9m.
Specific purpose is variable and the amount that reduces the screenings (uncooked timber) in the technology that can in the whole volume of container handling, handle timber comparably, minimize the Kappa number of the paper pulp of producing.Uniform initial distribution through alkaline black liquor; Therefore guaranteeing has enough alkali concns on entire cross section and the volume of container; Because acid prehydrolysis is unfavorable to pulp strength attribute and output, so also can reduce to be exposed to the wood chip volume of acid prehydrolysis widely.
Another specific purpose is the channelling effect that minimizes in wood chip or the timber plug flow, through use large diameter odd number central tube according to traditional prior art, almost unavoidably can form passage or space.If in container handling, form this passage, so the treatment fluid that is added of great majority or major part maybe be in container handling bypass through the overall flow of the timber that is intended to be processed.
Another specific purpose is to reduce from heat treatment solution to dodge the anxious steam rate that steams the steam of (flash off), and this itself has reduced steam and has produced the risk of raceway groove and leakage along the outer surface of supply pipe.Through reducing steam rate, also reduction being spurted is the risk that steam was pushed and crossed whole wood chip volume.
When boiling hardwood and cork sheet, bagasse and other annual plants, can advantageously use the present invention.
The invention summary
Characteristic of the present invention is limited independent claims, and optional embodiment then is limited in the dependent claims of quoting preceding claim successively.The present invention is also open with the form of preferred embodiment, if but clearly not to be defined as for the opinion effect be essential feature to any special characteristic of this embodiment, should be included in the present invention alternatively.
Description of drawings
Fig. 1 illustrates the steeper according to prior art;
Fig. 2 illustrates the details of the central tube that uses among Fig. 1;
Fig. 3 illustrates the side view of embodiments of the invention;
Fig. 4 illustrates the vertical view of Fig. 3.
The specific embodiment
In the following description, will use a technical term " treatment fluid (treatment liquor) ", the meaning of this term is meant a kind of treatment fluid that is intended to evenly add to the whole chip flow in the container handling.This treatment fluid can only comprise the waste cooking liquid (being black liquor) from the boiling vessel of back, but also can be following two or more mixtures of liquids:
Black liquor;
New cooking chemical, for example white liquid (and additive, for example anthraquinone (antraquinon));
Diluent liquid (promptly from these washing stages wash filtrate) from washing stage of back;
Steam (directly adding) with heat treated liquid.
Below also will use a technical term " treat liquid (treatment liquid) ", the meaning of this term is meant treat liquid that in container, forms or the treat liquid of taking out from container; Treat liquid except part for the treatment fluid of using, also comprise wood chip steam or the inclusions of any other organic or inorganic of decomposing out from wood chip.
Below also will use a technical term " container handling ", the meaning of this term is meant the container handling that is used for handling with delignification form or impregnation state any kind of of wood chip; Promptly this container can be atmospheric pressure combined type decatize and the container handling as IMPBIN equipment, or can be pressure cooker.
Used term " powder fiber cellulosic material (comminuted cellulose material) ", it preferably can be the wood chip form, but is to be such as sawdust or the such particles form (all obtaining from hardwood or cork) of pin chips more.
Fig. 1 illustrates the one type of prior art syringe that is used to flood wood chip during the manufacturing chemistry slurry of being sold by Metso; It possesses all basic elements of character of IMPBIN notion; Be included under the basic atmospheric pressure (± 0.5 crust, promptly be not pressure vessel) technology of wood chip being carried out wet steaming (wet-steaming).This device comprises the columnar basically steeper 30 of vertical setting; Wood chip without decatize supplies to via feedway in the top of steeper continuously, and this feedway is the spile buffer 1 that do not carry out decatize and the form of skewed slot feeder (wood chip feeder) 2.Therefore, supplying to wood chip in the steeper is the wood chip without heating that has usually with the environment temperature uniform temp.
The pressure of container can be through being arranged on steeper the valve pipeline 4 at top in control valve 31, also can be, and obtain adjustment on demand via the control combination of intake line 5 with steam ST.
When forming atmospheric pressure, above-mentioned valve pipeline can directly be opened to atmosphere.Pressure be preferably formed in atmospheric pressure, or be slightly less than outlet 4-0.5 crust (50kPa) pressure of size, or be slightly larger than the level of pressure of 0.5 crust (50kPa) size.
If necessary, can be at applied on top draft SW_AIR (sweep gas), guarantee like this to remove be present in the container or bring any gas in the container into by supplying with the powder fiber cellulosic material.
Wood chip through dipping is discharged via output device in the bottom of steeper 30 continuously; Here this output device is the form of outlet 10, and this output device also can make up with bottom scraper plate (not shown).
At dipping during wood chip, chip water prosposition CH_LEV should preferably be on the liquid level LIQ_LEV at least 2m and preferred 5m place at least.Under the situation with the slurrying of low-density raw material, the height of column of chips is preferably formed and is corresponding rising the on flow surface.In order the optimal path through container to be provided for the wood chip that is in even plug flow state, this is highly very important.
When mainly wood, for example eucalyptus or other annual plants of easy boiling type being flooded, can avoid basically carrying out decatize with live steam (primary steam).Therefore during normal steady state operation, live steam needn't add the wood chip at the top that is positioned at the liquid level that is formed by immersion fluid.Even utilize the soft low density carpentery workshop to be raw material, also can use the present invention, thereby significantly reduce needs decatize, promptly reduce the interpolation of live steam.
When main processing is difficult to the lower cork of wooden raw material, the especially density of boiling; And be under the extremely low temperature operational circumstances of (for example in the winter time) at wood chip; The wood chip that is positioned on the liquid level that is formed by immersion fluid can be heated through the external steam ST that adds steeper; Therefore before wood chip reached the liquid level that has been formed by treatment fluid, the temperature of the wood chip in the chip pile approached 100 ℃.
The treatment fluid that adds via convenience center pipe 7a also can be formed from the mixture of a plurality of sources (promptly not being from a public black liquor stream) fully independently.
For example, treatment fluid also can comprise wash filtrate.
In order to form the distribute purpose of (alkali profile) of the required alkali of technology, the treatment fluid that is added also can be the mixture of the addition of black liquor and fresh cooking chemical (being white liquid).Particularly, if residual basicity is low in the black liquor, then only simply for the wooden acidity that neutralizes, the initial fast of alkali is taken place usually consume, be desirably in simultaneously after the impregnation stage, last residual basicity remains on certain level.The alkali number that needs to add depends primarily on the level of the wooden acidity that during decatize, discharges in the wood chip volume that is on the liquid level, and therefore depends on the kind (cork or hardwood) of the wood that is being processed.
Container can be equipped with or not be equipped with and extract sieve (extraction screen), to allow carrying out liquid extraction (REC) in early days in technology.
Fig. 2 adds the detail drawing in the zone of treatment fluid BL via single central tube 7 among Fig. 1.Disclosed herein is the outlet that is positioned at the central tube 7 on the liquid level LIQ_LEV.The heat treatment solution that adds according to the notion of wet steaming is added into the center of container shown in the arrow of directed downwards.Therefore the pressure of the level of the port of export that is in central tube in the chip pile is lower than the boiling pressure of the treatment fluid that is added, and the treatment fluid that is added will be dodges the anxious steam that steams as (color) of points upwards darker arrow shown in.According to needs to this extra steam; Can highly add extra live steam and/or the flash vapor ST that is produced by another heat recovery system (for example dodging tornado separator (flash cyclone), reboiler, heat exchanger etc.) at this, this vapor stream is illustrated by the arrow of the lighter color of points upwards.
So shown in the figure, go out the alkali distribution situation of column of chips, wherein pH by the pH boundary representation
1And pH
2Be illustrated respectively in the different pH value that each corresponding edge boundary line forms, wherein the pH value is pH
1＞pH
2
Use big central tube to come another effect of providing chemical liquid to be, formed in bigger hole or the container the not compacter central part to the wood chip plug that descends, this zone is represented with CF.Compact inadequately this central part CF of wood chip can be configured for being added into the passage of treatment fluid; This has replaced making the mode that treatment fluid is assigned to whole wood chip volume that is added into, thereby makes under the condition in processing time and be added into the port of export that treatment fluid arrives container handling quickly consuming on the wood chip still less effectively.
Fig. 3 illustrates the preferred embodiments of the present invention, its focus on Fig. 1 in the relevant improvement of prior art design.Here be illustrated in during the continuous processing manufacturing chemistry slurry, be used for to the powder fiber cellulosic material, preferably adding the device of treatment fluid BL to wood chip.Said technology is used downflow system container 13, and to decline, and discharge continuously in the bottom of container in this container, is similar to the design of Fig. 1 by treated powder fiber cellulosic material with the plug flow form for the powder fiber cellulosic material in this container.The improvement here is that treatment fluid BL is fed to common header 7c from common source BL via pipeline 7.VERTICAL TUBE 7b is more than two, and VERTICAL TUBE 7b is connected with common header 7c with its upper end, and the open lower end of VERTICAL TUBE 7b is inserted in the wood chip plug flow.Further illustrate like the vertical view of Fig. 4, these VERTICAL TUBE are placed in radial position (radius) R1 in the container handling, and this radial position R1 is less than the radius R 2 of container handling at the height place of the open lower end of VERTICAL TUBE.
As shown in Figure 4, it is circular that common header 7c preferably is, and has radius R 1, and be arranged in the horizontal plane of container.This will make wood chip can supply to the center of container uninterruptedly.Radius R 1 preferably is in the scope of 20%-80% of radius R 2, and more preferably is in the scope of 50%-66% of radius R 2.In 50% the position of R1, identical apart from the distance of wall with distance apart from the center of container, so the equal in length of displacement path.66% the position of R1 is corresponding to " golden ratio "; Because the drum of container, similar paper pulp volume pass through to add treatment fluid and radially outwards reach to intrinsic displacement from adding point.In optional embodiment, interior collector also can be configured as " riding boots " shape, and the shape that promptly takes the shape of the letter U is to replace circular distributing pipe shown in Figure 4.
A plurality of VERTICAL TUBE 7b are connected to common header 7c along the circumferencial direction of circular common header 7c on position, uniform a plurality of angle.
This means that at least three VERTICAL TUBE 7b can be along the circumferencial direction of circular collector, on 120 ° the position, a plurality of angle of being separated by, be connected to common header 7c; Perhaps at least four VERTICAL TUBE 7b can be along the circumferencial direction of circular collector, on 90 ° the position, a plurality of angle of being separated by, is connected to common header 7c, and back one form is shown in Fig. 4.
As shown in Figure 3, can be provided with single control valve CV in the pipeline 7 outside the container handling 13, and control valve CV is preferably near the outer wall of container handling or be preferably placed on the outer wall of container handling.Through such setting, the pressure of treatment fluid is all kept in pipe-line system and up to the wall of container handling, any pressure drop only results from the pipeline in the container handling.
Common supply collector (not shown) in optional embodiment also can be positioned at outside the container, and each independent VERTICAL TUBE 7b can be by the independent control valve control of himself.
As shown in Figure 3; But and optionally; Wall that also can container handling is provided with from container handling and extracts the extraction filter (withdrawal strainer) 6 of handling flow, said extraction filter bits on the open lower end place of VERTICAL TUBE 7b and this lower end or under.Demand to any this extraction filter depends on alkali distribution situation and wooden kind in the whole technology to a great extent.
Therefore shown device provides a kind of during using the downflow system container with continuous processing manufacturing chemistry slurry, is used for adding to powder fiber cellulosic material (being preferably wood chip) method of treatment fluid; In this downflow system container wood chip with the plug flow form to decline; And treated wood chip is discharged in the bottom of container continuously; Two or more pipes via being set to be parallel to the plug flow direction add treatment fluids, and a plurality of on the plug flow zone are with a plurality of concurrent flow allocation process liquid and make the interference of plug flow reduce to minimum thus.
According to the method for the invention; Preferably (promptly except beginning and end or accidental the upset) during the steady state operation; The liquid level of container formed make it in container handling, be positioned under the level of wood chip, and make the outlet of pipe in container handling, be positioned on the liquid level but be positioned under the level of wood chip.The inventive method is utilized wet steaming technology; Boiling temperature under near the principal pressure effect of the treatment fluid that wherein adds via two or more pipes temperature of the position of these outlets surpass outlet makes to be positioned at the wood chip volume acquisition flash distillation effect on the liquid level in the container.Therefore, need not in order to carry out flash distillation (generation flash vapor) and to use any flash tank (flash tank) by the pressure of the black liquor that extracts from boiling vessel with to steam; Make the black liquor flash distillation but change in the chip pile of needs heating, and do not have energy loss.
Preferred but and under the non-essential pattern, can be according to the present invention, the extraction of handling of fluids is carried out in certain position in the wall of container handling, makes treatment fluid from the outlet of pipe and further pass wood chip and the displacement flow radially the liquid volume.
Except that shown in manage the embodiment that adds treatment fluid via two or more that are set to be parallel to the plug flow direction, also can add extra treatment fluid simultaneously via the distributing nozzle that is set at shell of tank.
Test
In the test of carrying out with major diameter IMPBIN equipment; Be similar to Fig. 1, have no extraction, be surprisingly found out that the pH level of 5m under the liquid level is low to moderate 9.0 at sieve section (extraction filter) 6; Because the indication of the pH value below 11 does not have residual alkali, so this hint does not have residual alkali.The sample of treat liquid is to extract in the simple 25mm stud openings (stud outlet) that is arranged in the 5m level.Low level like this is the most wonderful on the wall of IMPBIN equipment, puts down when being 88g/l because work as the buck of the treatment fluid of being supplied, and the residual buck from the wood chip that container handling is discharged is flat up to 35g/l.
When changing into 1.5m
3When the wood chip that is removed volume of/average over dry heavy (BDT) made an experiment, the residual buck that records about 2-5g/l in the treatment fluid was flat being extracted.Yet this still is not so good as the flat indicated such height of residual buck from the wood chip of container handling discharge.
These tests indicate the cardinal principle alkali distribution situation in the entire container as shown in Figure 2, have indicated border pH respectively
1And pH
2, and show need be on whole plug flow allocation process liquid better.
Claims (13)
- One kind during using the downflow system container with continuous processing manufacturing chemistry slurry, be used for adding the method for treatment fluid to the powder fiber cellulosic material that is preferably wood chip; In said container wood chip with the plug flow form to decline; And treated wood chip is discharged in the bottom of said container continuously; It is characterized in that; Two or more pipes via being set to be parallel to the plug flow direction add treatment fluids, a plurality of on the plug flow zone thus with a plurality of concurrent flow allocation process liquid, and make the interference of plug flow reduce to minimum.
- 2. method according to claim 1 is characterized in that the liquid level in the said container is formed, and makes said liquid level in container handling, be under the level of wood chip; And make the outlet of said pipe in said container handling, be on the liquid level, but be under the level of wood chip.
- 3. method according to claim 2; It is characterized in that; The temperature of treatment fluid in the position of said outlet that adds via said two or more pipe surpasses the boiling temperature under near the principal pressure effect the said outlet, makes in said container, to be positioned at the wood chip volume acquisition flash distillation effect on the said liquid level.
- 4. method according to claim 3 is characterized in that the extraction of handling of fluids is carried out in the position in the wall of said container handling, so that treatment fluid is from the outlet of said pipe and further pass wood chip and the displacement flow radially the liquid volume.
- One kind during using downflow system container (13) with continuous processing manufacturing chemistry slurry, be used for adding the device of treatment fluid to the powder fiber cellulosic material that is preferably wood chip; In said container, to decline, and discharge continuously in the bottom of said container, it is characterized in that treatment fluid is supplied to common header (7c) from common source (BL) via pipeline (7) by treated wood chip with the plug flow form for wood chip; VERTICAL TUBE (7b) is more than two; Said VERTICAL TUBE (7b) is connected with said common header with its upper end; And the open lower end of said VERTICAL TUBE (7b) is inserted in the wood chip plug flow; Said VERTICAL TUBE is set at the radial position R1 in the said container handling, and said radial position R1 is less than the radius R 2 of said container handling at the height place of the open lower end of said VERTICAL TUBE.
- 6. device according to claim 5 is characterized in that, said common header (7c) is circular, has radius R 1 and is arranged in the horizontal plane of said container.
- 7. device according to claim 6 is characterized in that, said radius R 1 is the 20%-80% of said radius R 2.
- 8. device according to claim 6 is characterized in that, said VERTICAL TUBE (7b) is being connected to said common header (7c) on the position, angle uniformly along the circumferencial direction of circular said collector.
- 9. device according to claim 8 is characterized in that, at least three VERTICAL TUBE (7b) are along the circumferencial direction of circular said collector, on 120 ° the position, a plurality of angle of being separated by, is connected to said common header (7c).
- 10. device according to claim 9 is characterized in that, at least four VERTICAL TUBE (7b) are along the circumferencial direction of circular said collector, on 90 ° the position, a plurality of angle of being separated by, is connected to said common header (7c).
- 11. as each described device in the aforementioned claim 5 to 10; It is characterized in that; Be provided with the single control valve (CV) that is used to be parallel to all single pipes that plug flow is provided with in the said pipeline (7) outside the said container handling, said control valve is preferably near the outer wall of said container handling or be positioned on the outer wall of said container handling.
- 12. according to each described device in the aforementioned claim 5 to 10; It is characterized in that; Be provided with the control valve (CV) that is used to be parallel to each single pipe that plug flow is provided with in the said pipeline (7) outside the said container handling, said control valve is preferably near the outer wall of said container handling or be positioned on the outer wall of said container handling.
- 13. according to each described device in the aforementioned claim 5 to 10; It is characterized in that; The wall of said container handling is provided with the extraction filter (6) that extracts treat liquid stream from said container handling, said extraction filter bits on the open lower end place of said VERTICAL TUBE (7b), the said open lower end or under.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SE2009/000383 WO2011021968A1 (en) | 2009-08-19 | 2009-08-19 | Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102639785A true CN102639785A (en) | 2012-08-15 |
| CN102639785B CN102639785B (en) | 2015-06-10 |
Family
ID=43607216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200980161863.4A Active CN102639785B (en) | 2009-08-19 | 2009-08-19 | Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US8801898B2 (en) |
| EP (1) | EP2467533B1 (en) |
| CN (1) | CN102639785B (en) |
| BR (1) | BR112012003861B1 (en) |
| WO (1) | WO2011021968A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE531079C2 (en) * | 2008-03-31 | 2008-12-09 | Metso Paper Inc | Device and method for diluting cellulose pulp |
| CN103534406B (en) * | 2011-03-25 | 2016-10-12 | 维美德公司 | The method and apparatus that treatment fluid is added to cellulosic material in downflow system container |
| RU2665424C1 (en) * | 2014-08-26 | 2018-08-29 | Вальмет Аб | Economically effective method of sulfate variation with use of polysulphide cream |
| EP3464714A4 (en) * | 2016-05-27 | 2019-12-25 | Valmet AB | Double alkali charging for chip impregnation |
| DE102018201676A1 (en) * | 2018-02-05 | 2019-08-08 | Dürkopp Fördertechnik GmbH | Carrying device for picking up goods |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2803540A (en) | 1956-03-06 | 1957-08-20 | Condi Engineering Corp | Wood chip digestion |
| US3881986A (en) | 1965-02-25 | 1975-05-06 | Svenska Cellulosa Ab | Method of producing homogeneously delignified pulp from fibrous material, containing lignocellulose, in a digester partially filled with liquor |
| US3434920A (en) | 1965-10-07 | 1969-03-25 | Frank B K Green | Apparatus for continuous digesting |
| SE330819B (en) | 1966-09-12 | 1970-11-30 | Kamyr Ab | |
| CA1056636A (en) * | 1975-04-07 | 1979-06-19 | Jerry Zucker | Digester system and method |
| US5635025A (en) | 1994-12-05 | 1997-06-03 | Ahlstrom Machinery Inc. | Digester system containing a single vessel serving as all of a chip bin, steaming vessel, and chip chute |
| SE523850E (en) | 1997-09-22 | 2009-06-02 | Metso Fiber Ab | Procedure for the pre-treatment of chips with base steam and impregnation liquid |
| SE510706C2 (en) | 1997-10-16 | 1999-06-14 | Kvaerner Pulping Tech | Process system and process for impregnating and basing chips before pulping |
| SE518738C2 (en) | 2001-12-17 | 2002-11-12 | Kvaerner Pulping Tech | Wood chip impregnation method for chemical pulping, comprises impregnating chips with liquid in different temperature zones of vessel |
| SE0401870D0 (en) * | 2004-07-15 | 2004-07-15 | Kvaerner Pulping Tech | Procedure for impregnating wood chips |
| SE0600309L (en) | 2006-02-10 | 2006-11-14 | Kvaerner Pulping Tech | Process for impregnating wood chips in a continuous cookery system |
| SE530725C2 (en) * | 2007-11-30 | 2008-08-26 | Metso Fiber Karlstad Ab | Apparatus and method for continuous basing of chips in the manufacture of cellulose pulp |
-
2009
- 2009-08-19 EP EP09848540.2A patent/EP2467533B1/en active Active
- 2009-08-19 CN CN200980161863.4A patent/CN102639785B/en active Active
- 2009-08-19 BR BR112012003861-3A patent/BR112012003861B1/en active IP Right Grant
- 2009-08-19 US US13/390,341 patent/US8801898B2/en active Active
- 2009-08-19 WO PCT/SE2009/000383 patent/WO2011021968A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2011021968A1 (en) | 2011-02-24 |
| EP2467533A4 (en) | 2013-11-20 |
| CN102639785B (en) | 2015-06-10 |
| BR112012003861A2 (en) | 2018-03-20 |
| EP2467533B1 (en) | 2015-09-30 |
| EP2467533A1 (en) | 2012-06-27 |
| US20120216971A1 (en) | 2012-08-30 |
| BR112012003861B1 (en) | 2019-07-02 |
| US8801898B2 (en) | 2014-08-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2591672C2 (en) | Method of producing cellulose fibre mass using prehydrolysis and sulphate pulping and equipment complex for implementation thereof | |
| CN102666974B (en) | For the method and system of thin chip boiling vessel boiling | |
| US7976675B2 (en) | Continuous digester system | |
| CN102639785B (en) | Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels | |
| FI122625B (en) | Procedure for the operation of a boiler and boiler | |
| CN103097606B (en) | For flooding the method and system of wood chip | |
| CN1981085A (en) | Methods to decrease scaling in digester systems | |
| US5236554A (en) | Digester having plural screens with means for controlling liquid injection and withdrawal | |
| US20010023748A1 (en) | Method and apparatus for continuously pulping cellulosic fibrous material | |
| JP2021517215A (en) | Dissolving pulp manufacturing method | |
| US3467573A (en) | Upflow digester containing means for separate removal of wash liquor and pulping liquor and method of pulping in said digester | |
| FI122630B (en) | Continuous digester system and method for operating a continuous cellulose digester | |
| JP4741797B2 (en) | A method for producing cellulose pulp and an apparatus for carrying out the method. | |
| FI126802B (en) | Process and continuous hydraulic boiler system for chemical pulp production | |
| CN103534406A (en) | Method and arrangement for adding treatment liquors to cellulose material in a down flow vessel | |
| EP3186439B1 (en) | Cost efficient kraft cooking method using polysulfide cooking liquor | |
| US4155805A (en) | Method for continuously digesting cellulosic fiber by evenly spreading the fiber material over the digestion vessel with steam | |
| FI120505B (en) | Continuous process for boiling cellulose-based pulp and pulp boiler suitable for the process | |
| CN115852725A (en) | Digester and cooking pulping process based on digester | |
| SE545465C2 (en) | Method and arrangement for adding treatment liquors to cellulose raw material in a continuous process using down flow vessels | |
| FI127420B (en) | Process for producing cellulose pulp | |
| CN106164370A (en) | The method of cooking cellulose fibrous material in continuous steamer | |
| WO2011053203A1 (en) | Method and arrangement for steaming and impregnating wood chips in a down flow vessel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: Sundsvall Applicant after: Valtra Inc. Address before: Sundsvall Applicant before: Metso Paper Karlstad Ab |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: METSO PAPER SWEDEN AB TO: VALTRA INC. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |